Find out who was on the board of this company. Do not use lawyers (except to consult with them perhaps) BUT LITIGATE LOCALLY AND PERSONALLY AGAINST THOSE BOARD-MEMBERS! Board-members have access to all IT people, through the nature of IT.
Time is money, so do it now. I only had < ten bucks in instawallet but will gladly advise any legal team. The only way to FORCE wallet holders on the web to be real, is to use the power of court fines against them. It is a fiscal responsibility of all who accept holding the money of the people of earth, that you harden your system, and act immediately, and openly, and FAST, when you get hacked.
What if Batman had 100,000 in instawallet? BTC I mean? The batcave miners need to hear what I am saying. Every hour you should be asking how many fly by night companies you will allow in your network.